yan po

Explanation:

pa brainliest po pls

Answer:

1) an element is a pure substance that consists of only one kind of atom

2) nitrogen makes up about 78% of the atmosphere by volume but the atmosphere of mars contains less than 3% nitrogen

3) boron has properties which are borderline between metals and non metals

4) oxygen is a colorless, odorless, tasteless, slightly magnetic gaseous element. this is the gas that everyone needs for breathing

5) aluminum is soft and lacks strength, but alloys with small amounts of copper, magnesium, silicon, manganese, and other elements have very useful properties.